Google is set to announce a second-generation Nexus tablet at an event next week with a higher resolution 7-inch screen and a 5MP rear-facing camera.

Specifications and price details have been leaked ahead of the announcement that claim the device will sell for £150 ($229) for a 16GB model and £175 ($269) for the 32GB version.

The device could also be the first to run Google's next operating system Android 4.3, which the company is also expected to launch on 24 July.

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The move is aimed at fending off increasing competition from Google, which recently revealed its new Nexus 7 tablet, which has a high resolution screen. The device runs the new Android 4.3, has a 7-inch, high-resolution display, a 5MP camera and will cost £150 when it goes on sale on 25 August

It has been a year since Google launched its bargain tablet built by Asus, which was praised for its high-quality specifications and its low price of £159.

Other 7-inch tablets including the iPad Mini cost around the £250 mark.